* config/open-axiom.m4 (OPENAXIOM_CPPFLAGS_FOR_VENDOR_LOCK_INS):

	New. Abstract over vendor lock-ins CPP flags.
	(OPENAXIOM_CHECK_MM): Check for file mapping capability.

6 files changed, 321 insertions, 58 deletions

diff --git a/ChangeLog b/ChangeLog
index bd54fa9a..34b609ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-08-18  Gabriel Dos Reis  <gdr@cs.tamu.edu>
+
+	* config/open-axiom.m4 (OPENAXIOM_CPPFLAGS_FOR_VENDOR_LOCK_INS): 
+	New. Abstract over vendor lock-ins CPP flags.
+	(OPENAXIOM_CHECK_MM): Check for file mapping capability.
+
 2010-08-17  Gabriel Dos Reis  <gdr@cs.tamu.edu>
 
 	* ChangeLog.jap: Merge with this ChangeLog.  Remove.
diff --git a/build-setup.sh b/build-setup.sh
index 5b2de857..64520b21 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -7,6 +7,7 @@ error() {
 
 # set -x
 
+rm -rf autom4te.cache
 autoheader || error "could not re-generate config/openaxiom-c-macros.h"
 autoconf || error "could not re-generate configure"
 
diff --git a/config/open-axiom.m4 b/config/open-axiom.m4
index ae73ec67..e888c971 100644
--- a/config/open-axiom.m4
+++ b/config/open-axiom.m4
@@ -175,6 +175,28 @@ AC_DEFINE_UNQUOTED([OPENAXIOM_BASE_RTS],
                    [The kind of base runtime system for this build.])
 ])
 
+dnl --------------------------------------------
+dnl -- OPENAXIOM_CPPFLAGS_FOR_VENDOR_LOCK_INS --
+dnl --------------------------------------------
+dnl Adjust CPPFLAGS before detecting several vendor lock-ins (or not.)
+AC_DEFUN([OPENAXIOM_CPPFLAGS_FOR_VENDOR_LOCK_INS],[
+case $host in
+  *linux*)
+     CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+     ;;
+  *bsd*|*dragonfly*)
+     CPPFLAGS="$CPPFLAGS -D_BSD_SOURCE"
+     ;;
+  *mingw*)
+     CPPFLAGS="$CPPFLAGS -DOPENAXIOM_MS_WINDOWS_HOST"
+     ;;
+  *solaris*)
+     ## FIXME: This should disappear
+     CPPFLAGS="$CPPFLAGS -DSUNplatform"
+     ;;
+esac
+])
+
 dnl ------------------------------
 dnl -- OPENAXIOM_HOST_COMPILERS --
 dnl ------------------------------
@@ -201,6 +223,7 @@ if test -n "$openaxiom_host_lisp_precision"; then
 fi
 OPENAXIOM_SATISFY_GCL_NEEDS
 AC_PROG_CPP
+OPENAXIOM_CPPFLAGS_FOR_VENDOR_LOCK_INS
 ])
 
 dnl -------------------------
@@ -964,29 +987,51 @@ OPENAXIOM_CHECK_BROWSER_SUPPORT
 ])
 
 
+dnl ------------------------
+dnl -- OPENAXIOM_CHECK_MM --
+dnl ------------------------
+dnl Check for host capability of memory mapping.
+AC_DEFUN([OPENAXIOM_CHECK_MM],[
+AC_CHECK_HEADERS([sys/mman.h])
+## We want annonymous mapping for memory allocation.  Unfortunately,
+## the flag for anonymous mapping is not standardized.  Popular names
+##  are MAP_ANONYMOUS and MAP_ANON.
+if test x"$ac_cv_header_sys_mman_h" = xyes; then
+   AC_MSG_CHECKING([for flag to request anonymous memory mapping])
+   AC_EGREP_CPP([MAP_ANONYMOUS],
+                [#include <sys/mman.h>
+#ifdef MAP_ANONYMOUS
+   "MAP_ANONYMOUS"
+#endif],
+                [openaxiom_mm_anonymous_flag=MAP_ANONYMOUS])
+   if test -z "$openaxiom_mm_anonymous_flag"; then
+      AC_EGREP_CPP([MAP_ANON],
+                   [#include <sys/mman.h>
+#ifdef MAP_ANON
+   "MAP_ANON"
+#endif],
+                   [openaxiom_mm_anonymous_flag=MAP_ANON])
+   fi
+   ## It would be curious that we don't have an anonymous mapping
+   ## capability.  Let that be known loudly.
+   if test -n "$openaxiom_mm_anonymous_flag"; then
+      AC_MSG_RESULT([$openaxiom_mm_anonymous_flag])
+   else
+      AC_MSG_ERROR([Could not find flag for anonymous map])
+   fi
+   AC_DEFINE_UNQUOTED([OPENAXIOM_MM_ANONYMOUS_MAP_FLAG],
+                      [$openaxiom_mm_anonymous_flag],
+                      [mmap anonymous flag])
+fi
+])
+
 dnl --------------------------
 dnl -- OPENAXIOM_CHECK_MISC --
 dnl --------------------------
 AC_DEFUN([OPENAXIOM_CHECK_MISC],[
 case $GCC in
   yes)
-     CCF="-O2 -Wall -D_GNU_SOURCE"
+     CFLAGS="$CFLAGS -O2 -Wall"
      ;;
 esac
-
-case $target in
-    *bsd*|*dragonfly*)
-	CCF="-O2 -Wall"
-	;;
-    *solaris*)
-        ## This should be taken out.
-        AC_DEFINE([SUNplatform], [], [SunOS flavour])
-	;;
-    powerpc*darwin*)
-	CCF="-O2 -Wall -D_GNU_SOURCE \
-	    -I/usr/include -I/usr/include/sys"
-	;;
-esac
-
-AC_SUBST(CCF)
 ])
diff --git a/config/openaxiom-c-macros.h.in b/config/openaxiom-c-macros.h.in
index 5b5e21e5..df10e836 100644
--- a/config/openaxiom-c-macros.h.in
+++ b/config/openaxiom-c-macros.h.in
@@ -84,6 +84,9 @@
 /* Define to 1 if you have the <sys/ioctl.h> header file. */
 #undef HAVE_SYS_IOCTL_H
 
+/* Define to 1 if you have the <sys/mman.h> header file. */
+#undef HAVE_SYS_MMAN_H
+
 /* Define to 1 if you have the <sys/socket.h> header file. */
 #undef HAVE_SYS_SOCKET_H
 
@@ -124,6 +127,9 @@
 /* The width of the host Lisp and CPU registers. */
 #undef OPENAXIOM_HOST_LISP_PRECISION
 
+/* mmap anonymous flag */
+#undef OPENAXIOM_MM_ANONYMOUS_MAP_FLAG
+
 /* Whether to use the session manager as driver. */
 #undef OPENAXIOM_USE_SMAN
 
@@ -148,9 +154,6 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
-/* SunOS flavour */
-#undef SUNplatform
-
 /* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
    significant byte first (like Motorola and SPARC, unlike Intel). */
 #if defined AC_APPLE_UNIVERSAL_BUILD
diff --git a/configure b/configure
index 93619bd0..1de37802 100755
--- a/configure
+++ b/configure
@@ -788,7 +788,6 @@ ac_includes_default="\
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
-CCF
 GCLOPTS
 string_type
 double_type
@@ -4063,6 +4062,23 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
+case $host in
+  *linux*)
+     CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+     ;;
+  *bsd*|*dragonfly*)
+     CPPFLAGS="$CPPFLAGS -D_BSD_SOURCE"
+     ;;
+  *mingw*)
+     CPPFLAGS="$CPPFLAGS -DOPENAXIOM_MS_WINDOWS_HOST"
+     ;;
+  *solaris*)
+     ## FIXME: This should disappear
+     CPPFLAGS="$CPPFLAGS -DSUNplatform"
+     ;;
+esac
+
+
 
 ## The following is a horrible hack to arrange for GCL to successfully
 ## rebuild symbol tables with "rsym" on Windows platform.  It should
@@ -6968,13 +6984,13 @@ if test "${lt_cv_nm_interface+set}" = set; then
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:6971: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:6987: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:6974: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:6990: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:6977: output\"" >&5)
+  (eval echo "\"\$as_me:6993: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -8176,7 +8192,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 8179 "configure"' > conftest.$ac_ext
+  echo '#line 8195 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -10456,11 +10472,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:10459: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:10475: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:10463: \$? = $ac_status" >&5
+   echo "$as_me:10479: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -10795,11 +10811,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:10798: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:10814: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:10802: \$? = $ac_status" >&5
+   echo "$as_me:10818: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -10900,11 +10916,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:10903: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:10919: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:10907: \$? = $ac_status" >&5
+   echo "$as_me:10923: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -10955,11 +10971,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:10958: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:10974: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:10962: \$? = $ac_status" >&5
+   echo "$as_me:10978: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -13755,7 +13771,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 13758 "configure"
+#line 13774 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13851,7 +13867,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 13854 "configure"
+#line 13870 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -15871,11 +15887,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:15874: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:15890: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:15878: \$? = $ac_status" >&5
+   echo "$as_me:15894: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -15970,11 +15986,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:15973: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:15989: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:15977: \$? = $ac_status" >&5
+   echo "$as_me:15993: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -16022,11 +16038,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16025: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16041: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16029: \$? = $ac_status" >&5
+   echo "$as_me:16045: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -22068,31 +22084,222 @@ GCLOPTS="$oa_gcl_emacs $oa_gcl_bfd_option $oa_gcl_mm_option $oa_gcl_x_option"
 
 
 
-case $GCC in
-  yes)
-     CCF="-O2 -Wall -D_GNU_SOURCE"
-     ;;
+
+for ac_header in sys/mman.h
+do
+as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  { $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
+$as_echo_n "checking for $ac_header... " >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  $as_echo_n "(cached) " >&6
+fi
+ac_res=`eval 'as_val=${'$as_ac_Header'}
+		 $as_echo "$as_val"'`
+	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ $as_echo "$as_me:$LINENO: checking $ac_header usability" >&5
+$as_echo_n "checking $ac_header usability... " >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
 esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_header_compiler=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
 
-case $target in
-    *bsd*|*dragonfly*)
-	CCF="-O2 -Wall"
-	;;
-    *solaris*)
-        ## This should be taken out.
+	ac_header_compiler=no
+fi
 
-cat >>confdefs.h <<\_ACEOF
-#define SUNplatform /**/
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:$LINENO: checking $ac_header presence" >&5
+$as_echo_n "checking $ac_header presence... " >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
 _ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <$ac_header>
+_ACEOF
+if { (ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }; then
+  ac_header_preproc=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
 
-	;;
-    powerpc*darwin*)
-	CCF="-O2 -Wall -D_GNU_SOURCE \
-	    -I/usr/include -I/usr/include/sys"
-	;;
+  ac_header_preproc=no
+fi
+
+rm -f conftest.err conftest.$ac_ext
+{ $as_echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
+  yes:no: )
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
+    ac_header_preproc=yes
+    ;;
+  no:yes:* )
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header:     check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $ac_header:     check for missing prerequisite headers?" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $ac_header:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+$as_echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
+    { $as_echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
+$as_echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
+    ( cat <<\_ASBOX
+## ------------------------------------------- ##
+## Report this to open-axiom-bugs@lists.sf.net ##
+## ------------------------------------------- ##
+_ASBOX
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
 esac
+{ $as_echo "$as_me:$LINENO: checking for $ac_header" >&5
+$as_echo_n "checking for $ac_header... " >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  $as_echo_n "(cached) " >&6
+else
+  eval "$as_ac_Header=\$ac_header_preproc"
+fi
+ac_res=`eval 'as_val=${'$as_ac_Header'}
+		 $as_echo "$as_val"'`
+	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+
+fi
+as_val=`eval 'as_val=${'$as_ac_Header'}
+		 $as_echo "$as_val"'`
+   if test "x$as_val" = x""yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
 
+fi
+
+done
 
+## We want annonymous mapping for memory allocation.  Unfortunately,
+## the flag for anonymous mapping is not standardized.  Popular names
+##  are MAP_ANONYMOUS and MAP_ANON.
+if test x"$ac_cv_header_sys_mman_h" = xyes; then
+   { $as_echo "$as_me:$LINENO: checking for flag to request anonymous memory mapping" >&5
+$as_echo_n "checking for flag to request anonymous memory mapping... " >&6; }
+   cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/mman.h>
+#ifdef MAP_ANONYMOUS
+   "MAP_ANONYMOUS"
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "MAP_ANONYMOUS" >/dev/null 2>&1; then
+  openaxiom_mm_anonymous_flag=MAP_ANONYMOUS
+fi
+rm -f conftest*
+
+   if test -z "$openaxiom_mm_anonymous_flag"; then
+      cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/mman.h>
+#ifdef MAP_ANON
+   "MAP_ANON"
+#endif
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "MAP_ANON" >/dev/null 2>&1; then
+  openaxiom_mm_anonymous_flag=MAP_ANON
+fi
+rm -f conftest*
+
+   fi
+   ## It would be curious that we don't have an anonymous mapping
+   ## capability.  Let that be known loudly.
+   if test -n "$openaxiom_mm_anonymous_flag"; then
+      { $as_echo "$as_me:$LINENO: result: $openaxiom_mm_anonymous_flag" >&5
+$as_echo "$openaxiom_mm_anonymous_flag" >&6; }
+   else
+      { { $as_echo "$as_me:$LINENO: error: Could not find flag for anonymous map" >&5
+$as_echo "$as_me: error: Could not find flag for anonymous map" >&2;}
+   { (exit 1); exit 1; }; }
+   fi
+
+cat >>confdefs.h <<_ACEOF
+#define OPENAXIOM_MM_ANONYMOUS_MAP_FLAG $openaxiom_mm_anonymous_flag
+_ACEOF
+
+fi
+
+
+case $GCC in
+  yes)
+     CFLAGS="$CFLAGS -O2 -Wall"
+     ;;
+esac
 
 
 ## We are ready to instantiate makefiles.
diff --git a/configure.ac b/configure.ac
index 8ada2984..495a01c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -104,6 +104,7 @@ OPENAXIOM_CHECK_GRAPHICS
 
 OPENAXIOM_FFI_TYPE_TABLE
 OPENAXIOM_GCL_BUILD_OPTIONS
+OPENAXIOM_CHECK_MM
 OPENAXIOM_CHECK_MISC
 
 ## We are ready to instantiate makefiles.